Main Motorcycle: Bonneville T100 SMQ SE
Join Date: Dec 2014
Location: Vancouver, Canada
Other Motorcycle: 1974 Norton Commando 850
TuneECU does not turn off O2 functions, it just disables the warning light if the cable is disconnected or some other problem with them occurs.
So even if friend performed correct procedure, I would not expect any change in bike if sensors were still connected.
Seems likely the disable process wasn't done right as the warning came on when you actually did unplug the sensors.
Dealer will always frown upon making changes from normal factory setup. You have a choice, go with dealer advice, let them do all the work and likely state the bike is running as designed, low rpm jerking and all
...or keep learning from these forums. PS there is a TuneECU for dummies thread on here someplace...lots of good details there.
2013 T100 Steve McQueen; +NH Togas; -SAI; -O2; +Breathe; +TTP#3; +Avon RoadRiders; +Iron&Resin Sidebag; +Kisan Auto-Off Indicators & BrakeLight Flasher; +MatchlessClueless LED Brake & Indicators; +LED 3000 Lumens Headlamp; +DeCosse Keyless system